Continuum diffusion models are often used to represent the collective motion of cell populations. Most previous studies have simply used linear diffusion to represent collective cell spreading, while others found that degenerate nonlinear diffusion provides a better match to experimental cell density profiles. In the cell modeling literature there is no guidance available with regard to which a...

We study avalanches in a model for a planar crack propagating in a disordered medium. Due to long-range interactions, avalanches are formed by a set of spatially disconnected local clusters, the sizes of which are distributed according to a power law with an exponent tau{a}=1.5. We derive a scaling relation tau{a}=2tau-1 between the local cluster exponent tau{a} and the global avalanche exponen...

When should a concern be handled by aspect code or by base code? What is the difference between base code and aspect code? Sometimes it seems like there is no clear way to distinguish between what should be base code and what should be aspect code. Indeed, this has been cited as a weakness AOP compared to SOP. This note suggests that there is a clear difference between base and aspect, but that...

We propose a joint model for unsupervised induction of sentiment, aspect and discourse information and show that by incorporating a notion of latent discourse relations in the model, we improve the prediction accuracy for aspect and sentiment polarity on the sub-sentential level. We deviate from the traditional view of discourse, as we induce types of discourse relations and associated discours...

Weaving an aspect may introduce undesired impacts on behavior of the base model or other afore-woven aspects. An approach to detect and evaluate the semantic influences of an aspect weaving on a pattern is presented. The pattern specifies a desired behavior that should stay unaltered or occur in the woven model. The detection and evaluation are based on the semantic relationship between a patte...

Nearly inviscid parametrically excited surface gravity-capillary waves in two-dimensional periodic domains of finite depth and both small and large aspect ratio are considered. Coupled equations describing the evolution of the amplitudes of resonant left- and right-traveling waves and their interaction with a mean flow in the bulk are derived, and the conditions for their validity established. ...

This paper presents a reflective architecture and an implemented prototype that supports aspect oriented programming in Smalltalk. The aspects are metaobjects which are weaved dynamically and the composition is noninvasive, thus enhancing flexibility and transparency.

Our previous research focused on reducing continuous monitoring overhead by employing architectural design that performs adaptive monitoring. In this paper we explore the use of other AOP or AOP-like tools for instrumentation. The goal is to find a tool that has lower overhead than AspectJ. Support for runtime changes of monitoring configuration is also considered. Our main topic of interest is...

The shape of an object is fundamental in object recognition but it is still an open issue to what extent shape differences are perceived analytically (i.e., by the dimensional structure of the shapes) or holistically (i.e., by the overall similarity of the shapes). The dimensional structure of a stimulus is available in a primary stage of processing for separable dimensions, although it can als...

Although local interactions involving orientation and spatial frequency are well understood, less is known about spatial interactions involving higher level pattern features. We examined interactive coding of aspect ratio, a prevalent two-dimensional feature. We measured perception of two simultaneously flashed ellipses by randomly post-cueing one of them and having observers indicate its aspec...